Remove unnecessary mocking of TickClock for events

ui/chromeos/touch_exploration_controller.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ui/chromeos/touch_exploration_controller.h"
 
 #include <utility>
 
 #include "base/logging.h"
 #include "base/strings/string_number_conversions.h"
-#include "base/time/default_tick_clock.h"
 #include "ui/accessibility/ax_enums.h"
 #include "ui/aura/client/cursor_client.h"
 #include "ui/aura/window.h"
 #include "ui/aura/window_event_dispatcher.h"
 #include "ui/aura/window_tree_host.h"
 #include "ui/events/event.h"
 #include "ui/events/event_processor.h"
 #include "ui/events/event_utils.h"
 #include "ui/gfx/geometry/rect.h"
 
@@ skipping 11 matching lines @@
 
 TouchExplorationController::TouchExplorationController(
     aura::Window* root_window,
     TouchExplorationControllerDelegate* delegate)
     : root_window_(root_window),
       delegate_(delegate),
       state_(NO_FINGERS_DOWN),
       anchor_point_state_(ANCHOR_POINT_NONE),
       gesture_provider_(new GestureProviderAura(this, this)),
       prev_state_(NO_FINGERS_DOWN),
-      VLOG_on_(true),
-      tick_clock_(NULL) {
+      VLOG_on_(true) {
   DCHECK(root_window);
   root_window->GetHost()->GetEventSource()->AddEventRewriter(this);
 }
 
 TouchExplorationController::~TouchExplorationController() {
   root_window_->GetHost()->GetEventSource()->RemoveEventRewriter(this);
 }
 
 void TouchExplorationController::SetTouchAccessibilityAnchorPoint(
     const gfx::Point& anchor_point) {
@@ skipping 631 matching lines @@
 
     DispatchEvent(&control_down);
     DispatchEvent(&control_up);
     SET_STATE(NO_FINGERS_DOWN);
     return ui::EVENT_REWRITE_DISCARD;
   }
   return ui::EVENT_REWRITE_DISCARD;
 }
 
 base::TimeTicks TouchExplorationController::Now() {
-  if (tick_clock_) {
-    // This is the same as what EventTimeForNow() does, but here we do it
-    // with a clock that can be replaced with a simulated clock for tests.
-    return tick_clock_->NowTicks();
-  }
   return ui::EventTimeForNow();
 }
 
 void TouchExplorationController::StartTapTimer() {
   tap_timer_.Start(FROM_HERE,
                    gesture_detector_config_.double_tap_timeout,
                    this,
                    &TouchExplorationController::OnTapTimerFired);
 }
 
@@ skipping 436 matching lines @@
       return "TWO_FINGER_TAP";
   }
   return "Not a state";
 }
 
 float TouchExplorationController::GetSplitTapTouchSlop() {
   return gesture_detector_config_.touch_slop * 3;
 }
 
 }  // namespace ui